// 业务模块1

export default (a,b) => {
    let sum = a + b
    console.log( 'a+b=' + sum )
}

class Cat{
    constructor(n,c){
        this.name = n
        this.color = c
    }
    skill(){
        console.log( '抓老鼠' )
    }
}

export {Cat}
